package com.alan.tomcat.page2;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * Created by Alan on 2018/11/15.
 */
public class HttpServer2 {

    //shutdown command
    private static final String SHUTDOWN_COMMAND = "/SHUTDOWN";
    //the shutdown command received
    private boolean shutdown = false;

    public static void main(String[] args) {
        HttpServer2 server = new HttpServer2();
        server.await();
    }


    public void await(){
        ServerSocket serverSocket = null;
        int port = 8080;
        try {
            serverSocket = new ServerSocket(port, 1, InetAddress.getByName("127.0.0.1"));
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(1);
        }
        //loop waiting for a request
        while (!shutdown){
            Socket socket = null;
            InputStream input = null;
            OutputStream output = null;
            try {
                socket = serverSocket.accept();
                input = socket.getInputStream();
                output = socket.getOutputStream();

                //create request object and parse
                Request request = new Request(input);
                request.parse();
                //create response object
                Response response = new Response(output);
                response.setRequest(request);
                //check if this is a request for a servlet or
                //a static resource
                //a request for a servlet begins with "/servlet/"
                if(request.getUri().startsWith("/servlet/")){
                    ServletProcessor2 processor = new ServletProcessor2();
                    processor.process(request, response);
                } else {
                    StaticResourceProcessor processor = new StaticResourceProcessor();
                    processor.process(request,response);
                }
                //Close the socket
                socket.close();
                //check if the previous URI is a shutdown command
                shutdown = request.getUri().equals(SHUTDOWN_COMMAND);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}
